"He is MIA and nothing but trouble", Trumptweeted, adding, "He is better off in Argentina".

While Sanford had already expressed reservations at his chances of winning, Trump's tweet appeared to be the nail in his coffin. He won the Charleston-based congressional seat in a special election, and established himself as a fiscally conservative, libertarian-leaning voice and member of the House Freedom Caucus.

Another House race worth watching is in SC, where Archie Parnell is poised to win the Democratic primary in the 5th District despite admitting to domestic abuse in the 1970s.

President Donald Trump is trumpeting the defeat of a South Carolina Republican congressman who has been critical of his administration.

The South Carolina congressman lost to state lawmaker Katie Arrington, who won Trump's support just hours before the polls closed Tuesday.

Tuesday afternoon, the President endorsed her bid for Congress in a Tweet criticizing Sanford.

Tarkanian is one of the only Republicans in Nevada who was on the ballot in 2016 for a national race who stuck with President Trump and did not abandon him when House Speaker Paul Ryan did abandon the president and encouraged other members to do so as well.

Sanford blamed his loss on Trump, saying his election came down to people questioning whether he was for or against Trump.

The outcome is a cautionary tale for Republicans in Congress who try to work with Trump while also maintaining their independence.

"She's a woman, so it's the year of the woman", Hostin explained. He is better of in Argentina.

"I think the thing is representation", Sara Haines explained. Republican lawmakers simply can not cross the president and expect to hold onto their jobs. Bernie Sanders (I-Vt.) will go nuts and insist the Democratic Party's 2020 presidential nominee come from the far left.

Cramer is in his third term representing North Dakota's at-large congressional district, giving him strong name recognition and a track record of being elected to statewide office.

He demurred during the run-up to the 2016 election when asked if he'd support Trump and spoke out against the president after the election on issues such as limiting Muslim immigrants.

While fealty to the Republican president may be a requirement to win low-turnout Republican primaries dominated by conservative activists, it could prove a tougher sell against energized anti-Trump Democratic forces in midterm elections this fall. McMaster was one of the few established Republicans in the state to back Trump in 2016, and became governor when Trump named Nikki Haley as United Nations ambassador. He can win. Even Fake News CNN said the Trump impact was really big, much bigger than they ever thought possible.

In North Dakota and Nevada, voters set the stage for two of the most competitive U.S. Senate races in November, when Democrats must pick up two seats to capture a Senate majority. He also voted against a border wall proposal, called Trump's proposed tariffs on aluminum and steel "an experiment with stupidity" and was unrelenting in calling for Trump to release his tax returns.